I'm now on LR 6.3
I keep my image files on an external HDD (with two further backups).
Images are kept in folders by month, and months are inside years: so, 2015 contains 2015-01 through to 2015-12.
I add new images to the external HDD, and then synchronise LR by right-clicking on the folder.
Previously, I could just click on 2015; but when I try this now, I'll be told there are 350 (or whatever number) of files to synchronise. I click synchronise, things seem to happen, but then I get a message to say "no files to synchronise".
If I click on the sub-folder 2015-12, I'm told there are say, 299 files to synchronise; and LR will then synchronise without problems.
So I now have to hunt through all of 2015 to find the (apparently) unsynchronised 51 files.
Anyone else have this stupid problem?